Most common catheter induced blood infection is due to-
**Core Concept**
Catheter-induced blood infections, also known as central line-associated bloodstream infections (CLABSIs), occur when bacteria or other microorganisms enter the bloodstream through a central venous catheter. This type of infection is a significant concern in healthcare settings, particularly in critically ill patients.
**Why the Correct Answer is Right**
The most common cause of CLABSIs is Staphylococcus epidermidis, a type of coagulase-negative staphylococcus that is commonly found on the skin. This bacterium can colonize the catheter hub and subsequently enter the bloodstream, causing infection. The ability of S. epidermidis to form biofilms on the catheter surface makes it particularly difficult to eradicate, contributing to the high incidence of CLABSIs.
**Why Each Wrong Option is Incorrect**
**Option A:** Enterococcus faecalis is a common cause of urinary tract infections and endocarditis, but it is not the most common cause of CLABSIs.
**Option B:** Staphylococcus aureus is a common cause of skin and soft tissue infections, as well as more serious conditions like osteomyelitis and endocarditis, but it is not the most common cause of CLABSIs.
**Option C:** Escherichia coli is a common cause of urinary tract infections and sepsis, but it is not typically associated with CLABSIs.
**Clinical Pearl / High-Yield Fact**
When inserting a central venous catheter, healthcare providers should prioritize meticulous hand hygiene, use sterile technique, and apply chlorhexidine gluconate to the skin to reduce the risk of S. epidermidis colonization and subsequent CLABSIs.
**Correct Answer:** C.